Buggy code:
public class JobManager implements NetworkEventProvider . Listener { public static final long NS_PER_MS = 1000000 ; public static final long NOT_RUNNING_SESSION_ID = Long . MIN_VALUE ; public static final long NOT_DELAYED_JOB_DELAY = Long . MIN_VALUE ; @ SuppressWarnings ( "FieldCanBeLocal" ) private final long sessionId ; private volatile boolean running ; private final Context appContext ; private final NetworkUtil networkUtil ; private final DependencyInjector dependencyInjector ; private final JobQueue persistentJobQueue ; private final JobQueue nonPersistentJobQueue ; private final CopyOnWriteGroupSet runningJobGroups ; private final JobConsumerExecutor jobConsumerExecutor ; private final Object newJobListeners = new Object ( ) ; private final ConcurrentHashMap < Long , CountDownLatch > persistentOnAddedLocks ; private final ConcurrentHashMap < Long , CountDownLatch > nonPersistentOnAddedLocks ; private ScheduledExecutorService timedExecutor ; private Executor cancelExecutor ; private final Object getNextJobLock = new Object ( ) ; public JobManager ( Context context ) { } public JobManager ( Context context , String id ) { } public JobManager ( Context context , Configuration config ) { } public void stop ( ) { } public void start ( ) { } public int count ( ) { } private int countReadyJobs ( boolean hasNetwork ) { } public long addJob ( Job job ) { JobHolder jobHolder = new JobHolder ( job . getPriority ( ) , job , ( ( job . getDelayInMs ( ) ) > 0 ? ( System . nanoTime ( ) ) + ( ( job . getDelayInMs ( ) ) * ( JobManager . NS_PER_MS ) ) : JobManager . NOT_DELAYED_JOB_DELAY ) , JobManager . NOT_RUNNING_SESSION_ID ) ; long id ; if ( job . isPersistent ( ) ) { synchronized ( persistentJobQueue ) { id = persistentJobQueue . insert ( jobHolder ) ; addOnAddedLock ( persistentOnAddedLocks , id ) ; } } else { synchronized ( nonPersistentJobQueue ) { id = nonPersistentJobQueue . insert ( jobHolder ) ; addOnAddedLock ( nonPersistentOnAddedLocks , id ) ; } } if ( JqLog . isDebugEnabled ( ) ) { JqLog . d ( "added<seq2seq4repair_space>job<seq2seq4repair_space>id:<seq2seq4repair_space>%d<seq2seq4repair_space>class:<seq2seq4repair_space>%s<seq2seq4repair_space>priority:<seq2seq4repair_space>%d<seq2seq4repair_space>delay:<seq2seq4repair_space>%d<seq2seq4repair_space>group<seq2seq4repair_space>:<seq2seq4repair_space>%s<seq2seq4repair_space>persistent:<seq2seq4repair_space>%s<seq2seq4repair_space>requires<seq2seq4repair_space>network:<seq2seq4repair_space>%s" , id , job . getClass ( ) . getSimpleName ( ) , job . getPriority ( ) , job . getDelayInMs ( ) , job . getRunGroupId ( ) , job . isPersistent ( ) , job . requiresNetwork ( ) ) ; } if ( ( dependencyInjector ) != null ) { dependencyInjector . inject ( job ) ; } jobHolder . getJob ( ) . setApplicationContext ( appContext ) ; jobHolder . getJob ( ) . onAdded ( ) ; if ( job . isPersistent ( ) ) { synchronized ( persistentJobQueue ) { clearOnAddedLock ( persistentOnAddedLocks , id ) ; } } else { synchronized ( nonPersistentJobQueue ) { clearOnAddedLock ( nonPersistentOnAddedLocks , id ) ; } } <START_BUG> notifyJobConsumer ( ) ; <END_BUG> return id ; } public void cancelJobsInBackground ( final CancelResult . AsyncCancelCallback cancelCallback , final TagConstraint constraint , final String ... tags ) { } public CancelResult cancelJobs ( final TagConstraint constraint , final String ... tags ) { } private void markJobsAsCancelledAndFilterAlreadyCancelled ( Set < JobHolder > jobs , JobQueue queue , Set < Long > outIds ) { } public void addJobInBackground ( Job job ) { } public void addJobInBackground ( final Job job , final AsyncAddCallback callback ) { } private void addOnAddedLock ( ConcurrentHashMap < Long , CountDownLatch > lockMap , long id ) { } private void waitForOnAddedLock ( ConcurrentHashMap < Long , CountDownLatch > lockMap , long id ) { } private void clearOnAddedLock ( ConcurrentHashMap < Long , CountDownLatch > lockMap , long id ) { } private long ensureConsumerWhenNeeded ( Boolean hasNetwork ) { } private void notifyJobConsumer ( ) { } private final Runnable notifyRunnable = new Runnable ( ) { @ Override public void run ( ) { } } ; private void ensureConsumerOnTime ( long waitMs ) { } private boolean hasNetwork ( ) { } private JobHolder getNextJob ( ) { } private void reAddJob ( JobHolder jobHolder ) { } public JobStatus getJobStatus ( long id , boolean isPersistent ) { } private void removeJob ( JobHolder jobHolder ) { } public synchronized void stopAndWaitUntilConsumersAreFinished ( ) throws InterruptedException { } public synchronized void clear ( ) { } @ Override public void onNetworkChange ( boolean isConnected ) { } @ SuppressWarnings ( "FieldCanBeLocal" ) private final Contract consumerContract = new JobConsumerExecutor . Contract ( ) { @ Override public boolean isRunning ( ) { } @ Override public void insertOrReplace ( JobHolder jobHolder ) { } @ Override public void removeJob ( JobHolder jobHolder ) { } @ Override public JobHolder getNextJob ( int wait , TimeUnit waitDuration ) { } @ Override public int countRemainingReadyJobs ( ) { } } ; public static class DefaultQueueFactory implements QueueFactory { JobSerializer jobSerializer ; public DefaultQueueFactory ( ) { } public DefaultQueueFactory ( SqliteJobQueue . JobSerializer jobSerializer ) { } @ Override public JobQueue createPersistentQueue ( Context context , Long sessionId , String id , boolean inTestMode ) { } @ Override public JobQueue createNonPersistent ( Context context , Long sessionId , String id , boolean inTestMode ) { } } }

Fix:
ensureConsumerWhenNeeded ( null ) ;